Effect of Liquid Compressibility on Supercavitation Flow of High-speed Projectiles

被引：0
|
作者：
Cao X. [1 ]
Hu J. [1 ]
Yu Y. [1 ]
机构：
[1] School of Astronautics, Beijing Institute of Technology, Beijing
来源：
Binggong Xuebao/Acta Armamentarii | 2020年 / 41卷
关键词：
High-speed projectile; Liquid compressibility; Shock wave; Supercavitation; Tait equation of state;
D O I：
10.3969/j.issn.1000-1093.2020.S1.011
中图分类号：
学科分类号：
摘要：
The water-entering process of high-speed projectile under different Mach numbers was simulated to analyze the effect of fluid compressibility on the flow field characteristics, cavity shape and hydrodynamic characteristics. The simulated results with and without considering the fluid compressibility were compared by inserting Tait equation of state based on volume-of-fluid multiphase flow model. The results show that the flow field density and pressure gradient increase when considering the compressibility of liquid; the cavitation radius gradually decreases with the increase in Mach number. At the supersonic speed, a deviation shock wave is generated near the projectile head; the cavitation becomes a local cavitation, and the resistance to the projectile greatly increases; and the fluid compressibility affects the supercavitation flow at more than 0.5 Ma. © 2020, Editorial Board of Acta Armamentarii. All right reserved.
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页码：72 / 78
页数：6
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